John v



(No Model.)

J.V.B.OARTER. PATTERN FOR FOUNDING.

Patented June 24 5 UNITED STATES PATENT OFFICE.

JOHN V. B. CARTER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE BRIDGE dc BEACH MANUFACTURING COMPANY, OF SAME PLACE.

PATTERN FOR FOUNDING.

SPECIFICATION forming part of Letters Patent No. 430,831, dated June 24, 1890.

Application filed April 4, 1890- Serial No. 3 26657. (No model.)

To all whom it may concern:

Be it known that 1, JOHN V. B. CARTER, a citizen of the United States, residing in the city of St. Louis, State of Missouri, have invented certain new and usefullmprovements in Patterns for Founding, of which the following is a full, clear, and exact description.

My invention relates to improvements in the construction and application of that class of patterns in which an ear or projection is formed on the body of the pattern, of such shape that if it were drawn with the same the pattern would not deliver; and it consists in features of novelty hereinafter described.

The object of my invention is to provide means for removably securing an ear or under-cut to the body of a pattern in such manner that, first, in the casting made from such a pattern the body and the ear shall be formed in one and the same piece; second, that the means for fastening the under-cut to the body of the pattern be rigid and strong, so as to permit of the sand being properly rammed around it without displacing or loosening the under-cut; third, that the fastening device be so designed and constructed as to compensate for any wear that may occur from use; fourth, that the fastening be such as to permit of the under-cut being readily disengaged, when desirable, and, fifth, that the under-cut can be, after the pattern has been disengaged from it, conveniently drawn.

In the following specification I have described my invention as adapted to secure the pattern of the handle of a stove-door to the pattern of the door.

It is obvious that it is one of many cases in which the essential operative features of my invention may be applied.

In the accompanying drawings, Figures 1 and 2 are perspective views of a portion of a stove-door pattern, showing, respectively, the handle-pattern attached and detached. Fig. 3 is a sectional view of the drag after the door pattern has been disengaged from the handle-pattern and drawn, showing the handlepattern partly drawn. Figs. 4 and 5 are sectional views of the door-pattern with the handle-pattern attached, taken, respectively, on a line a little above and at one side of the handle-pattern.

handle. Fig. 6 is a back view of a portion of the door-pattern, showing the hole cut in the same for receiving the fastening device of the Figs. 7, 8, and 9 are respectively a side, back, and top view of the handle-pattern, showing the fastening device.

Like letters of reference denote like parts in the several figures.

The handle-pattern A is formed as a whole, so as to deliver. The back part of it is spread or flared out, so as to meet the door pattern B, also to form the bracing-shoulder a, and comparatively large bearing-surface, as it rests against the door-pattern in a shallow recess 1), cut in the side of the door-pattern to accommodate it. The stem end a of the fastening-bolt D is let into the back side of the piece A, as shown in Figsnl and 5, and secured therein, so as to permit of it being turned but not withdrawn. This is preferably done by the end of a screw or pin 6, let into the piece A, engaging the stem 0 in a circumferential groove 01 out therein, as shown in dotted lines in Figs. 5, 7, and 9. The projecting end of the bolt D is flattened out, so as to form the head g with the oppositely-projecting lips f. At a point in the recess 1), suitable to accommodate the head 9 of the bolt D, an oblong hole 71. is cut in the door-pattern B. On the back side of the door-pattern B the sides of the hole h are raised, forming the two oppositely-inclined surfaces 6.

In practice the handle-pattern A is placed on the door-pattern B, the flat flared portion a resting in its recess 19, and the head g projecting through the hole 71. The flat head 9 is then turned, the lips f engaging the doorpattern on the inclined surfaces 1' until the pieces A and B are firmly and securely fastened together.

The inclined surfaces 1' not only act as wedges in fastening the pieces A and B together, thereby making the connection much more rigid than would be possible if the lips f had only the flat surface of the doorpattern to turn on, but they will also compensate for any wear that may occur in the several parts of the fastening device. The flared part a of the piece A, resting in and fitting the recess b, keeps the handle-pattern from wabbling or twisting when fastened to the doorpattern. The two parts being thus fastened together, the pattern is properly placed, and the flask filled and rammed. The cope is then lifted. After the door-pattern has been disengaged from the handle-pattern by turning the head g of the bolt D, so that it will pass through the hole h, the door-pattern is drawn from the drag, leaving the ear or under-cut A in the sand. The handle-patternA is then easily drawn by taking hold of itby the bolt-head g. Fig. 3 shows the doorpattern removed and the handle-pattern partially drawn.

I claim 1. In molders underoutpatterns, the combination, with the main pattern or body portion having a countersunk seat therein, of a detachable undercut portion having its base formed to fit the countersunk seat of the main pattern, and a draw-pin for forcing the undercut section to its seat and connecting it to the main portion of the pattern, substantially as and for the purposes described. v

2. In molders undercut patterns, the combination, with the main pattern or body portion having a countersunk seat in one side, a hole through said countersunk seat, and inclines on the opposite side and adjacent to said countersunk seat, of a detachable undercut portion having its base formed to fit the countersunk seat, and a' draw-pin engaging the undercut portion and having shoulders at its opposite end adapted to bear against said inclines to force the undercut section to the seat and connect it to the main portion, substantially as-and for the purposes described.

In testimonywhereof I have affixed mysignature, in presence of two witnesses, this 19th day of March, 1890.

JOHN V. B. CARTER.

Witnesses:

PAUL BAKEWELL, J. W. ORooKEs. 

